Question

我正在学习kafka，并正在关注2.0.0的教程。我有一个针对消费者的示例代码

 Properties properties = new Properties();
    properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
    properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
    properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
    properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG, groupId);
    properties.setProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");

    //Create consumer
   // KafkaConsumer<String,String>  kafkaConsumer = new KafkaConsumer<String, String>(properties);


    KafkaConsumer<String, String> consumer = new KafkaConsumer<String, String>(properties);

    // subscribe consumer to our topic(s)
    consumer.subscribe(Arrays.asList(topic));
    //Poll on new Data

    while(true){
        ConsumerRecords<String, String> records =
                consumer.poll(Duration.ofMillis(100));

        for (ConsumerRecord<String, String> record : records){
            _log.debug("Key: " + record.key() + ", Value: " + record.value());
            _log.debug("Partition: " + record.partition() + ", Offset:" + record.offset());
        }
    }

此代码在2.0.0上有效，但是如果我将kafka版本更新为2.3.0或2.4.0，则记录将为空。我已经把消息推送给生产者了。

我一直在浏览文档，但无法在此处找出需要更改的内容

Kakfa Consumer.poll不返回2.4.0的记录

0 个答案: